GB1549029A - Process for the conversion of gypsum into calcium sulphate hemihydrate - Google Patents

Process for the conversion of gypsum into calcium sulphate hemihydrate

Info

Publication number: GB1549029A
Authority: GB; United Kingdom
Prior art keywords: gypsum; conversion; calcium sulphate; sulphate hemihydrate; hemihydrate
Prior art date: 1975-05-23
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired

Application number

GB21196/76A

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Rhone Poulenc Industries SA

Original Assignee

Rhone Poulenc Industries SA

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1975-05-23

Filing date

1976-05-21

Publication date

1979-08-01

1976-05-21 Application filed by Rhone Poulenc Industries SA filed Critical Rhone Poulenc Industries SA

1979-08-01 Publication of GB1549029A publication Critical patent/GB1549029A/en

Status Expired legal-status Critical Current

Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B15/00—Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
- C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
- C04B11/0283—Fluidised beds

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Ceramic Engineering (AREA)
Materials Engineering (AREA)
Structural Engineering (AREA)
Organic Chemistry (AREA)
Dispersion Chemistry (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Crucibles And Fluidized-Bed Furnaces (AREA)
Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

GB21196/76A 1975-05-23 1976-05-21 Process for the conversion of gypsum into calcium sulphate hemihydrate Expired GB1549029A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR7516119A FR2311764A1 (en)	1975-05-23	1975-05-23	METHOD AND APPARATUS FOR THERMAL TRANSFORMATION OF GYPSUM

Publications (1)

Publication Number	Publication Date
GB1549029A true GB1549029A (en)	1979-08-01

Family

ID=9155595

Family Applications (2)

Application Number	Title	Priority Date	Filing Date
GB39419/77A Expired GB1549030A (en)	1975-05-23	1976-05-21	Apparatus suitable for the conversion of gypsum into calcium sulphate hemihydrate
GB21196/76A Expired GB1549029A (en)	1975-05-23	1976-05-21	Process for the conversion of gypsum into calcium sulphate hemihydrate

Family Applications Before (1)

Application Number	Title	Priority Date	Filing Date
GB39419/77A Expired GB1549030A (en)	1975-05-23	1976-05-21	Apparatus suitable for the conversion of gypsum into calcium sulphate hemihydrate

Country Status (11)

Country	Link
US (1)	US4247518A (en)
JP (1)	JPS52795A (en)
BR (1)	BR7603245A (en)
DE (1)	DE2622994B2 (en)
FR (1)	FR2311764A1 (en)
GB (2)	GB1549030A (en)
GR (1)	GR58250B (en)
IT (1)	IT1061560B (en)
MX (1)	MX3470E (en)
TR (1)	TR19196A (en)
ZA (1)	ZA763014B (en)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2727544C2 (en) *	1977-06-18	1987-01-22	Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck	Process for drying and firing gypsum dihydrate to gypsum hemihydrate
CH645083A5 (en) *	1980-05-20	1984-09-14	Escher Wyss Ag	METHOD AND DEVICE FOR RECALCINATING A SLAVE CONTAINING CALCIUM CARBONATE.
JPS5745335A (en) *	1980-09-02	1982-03-15	Mitsui Eng & Shipbuild Co Ltd	Heating fluidized bed reactor
US4475884A (en) *	1982-11-30	1984-10-09	The United States of America as represented by the United States _Department of Energy	Reversed flow fluidized-bed combustion apparatus
US4503018A (en) *	1983-02-14	1985-03-05	Davy Mckee Corporation	Desulfurization of phosphogypsum
US4533528A (en) *	1983-07-15	1985-08-06	United States Gypsum Company	Process for continuously calcining gypsum to low dispersed consistency stucco
CA1258961A (en) *	1984-09-17	1989-09-05	Yoshihiko Kudo	PROCESS FOR PRODUCING .alpha.-FORM GYPSUM HEMIHYDRATE
US4946658A (en) *	1986-11-06	1990-08-07	Florida Institute Of Phosphate Research	Addition of pyritic materials to feed mix for desulfurization of phosphogypsum
DE3721421A1 (en) *	1987-06-29	1989-01-12	Deutsche Filterbau	Process for producing dry calcium-sulphate dihydrates from flue-gas gypsum
DE3738301A1 (en) *	1987-11-11	1989-05-24	Peters Ag Claudius	Process and appliance for calcining gypsum
GB2214836B (en) *	1988-02-08	1991-06-26	Bpb Industries Plc	Improvements in method and apparatus for calcination
US4917024A (en) *	1989-05-24	1990-04-17	Florida Institute Of Phosphate Research	Coal fired power plant with pollution control and useful byproducts
US5198029A (en) *	1989-08-01	1993-03-30	Gte Products Corporation	Apparatus for coating small solids
GB8917963D0 (en) *	1989-08-05	1989-09-20	Scras	Apparatus for repeated automatic execution of a thermal cycle for treatment of biological samples
DD296058A5 (en) *	1990-02-19	1991-11-21	Veb Zementwerke Ruedersdorf,De	PROCESS FOR DEHYDRATING GRAVES
US5143698A (en) *	1990-03-05	1992-09-01	Uop	Apparatus for internal backmix cooling
FR2660303B1 (en) *	1990-03-27	1992-07-17	Electricite De France	PROCESS AND DEVICE FOR FORMING CALCIUM OXIDE.
US5139749A (en) *	1990-06-22	1992-08-18	Tas, Inc.	Fluidized calcining process
DE4109743C2 (en) *	1991-03-25	1995-03-23	Escher Wyss Gmbh	Process for the thermal treatment of moist hydrates
AT397929B (en) *	1992-12-04	1994-08-25	Chemiefaser Lenzing Ag	METHOD AND SYSTEM FOR DRYING AND SUBJECT CLEAVING
US5743728A (en) *	1995-08-15	1998-04-28	Usg Corporation	Method and system for multi-stage calcining of gypsum to produce an anhydrite product
DE19606075C2 (en) *	1996-02-19	2000-02-17	Sulzer Chemtech Gmbh	Processes and devices for the thermal treatment of gypsum
DE19627249C2 (en) *	1996-07-08	2002-01-17	Sicowa Verfahrenstech	Process for the preparation of practically phase-pure calcium sulfate beta hemihydrate
FR2836913B1 (en) *	2002-03-08	2006-11-24	Lafarge Platres	DEVICE FOR DRYING AND / OR COOKING GYPSUM
EP1726575A1 (en) *	2005-05-27	2006-11-29	Promat International N.V.	Method for plaster production and plaster product obtained by said method.
HUE029576T2 (en)	2006-01-13	2017-03-28	Certainteed Gypsum Inc	System and method for the production of alpha type gypsum using heat recovery
US8388926B2 (en)	2006-01-13	2013-03-05	Certainteed Gypsum, Inc.	System and method for the production of gypsum using heat recovery
AU2009215632B2 (en) *	2008-02-19	2013-11-28	United States Gypsum Company	Method and apparatus for pressurized calcination of gypsum
EP2163532A1 (en) *	2008-09-11	2010-03-17	Claudius Peters Technologies GmbH	Method and device for manufacturing stone plaster
US7897134B1 (en) *	2009-08-07	2011-03-01	Alstom Technology Ltd	System and method for calcining gypsum
CN102491659B (en) *	2011-12-02	2013-03-27	宋乐柱	Fluidized bed type gypsum calcining device
CN115594428B (en) *	2022-10-26	2023-11-24	宜都兴发化工有限公司	Phosphogypsum MVR drying device and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2498405A (en) *	1946-03-11	1950-02-21	Jeffrey Mfg Co	Continuous vibrating reaction chamber
US2797908A (en) *	1956-05-10	1957-07-02	Zubrzycki Boleslaw Joseph	Zoning device for horizontal fluo-solid beds
NL133712C (en) *	1961-02-14	1971-10-15
NL289258A (en) *	1962-02-27
US3869256A (en) *	1972-09-28	1975-03-04	Atomic Energy Commission	Continuous fluid bed reactor for fissionable material
GB1504282A (en) *	1974-02-16	1978-03-15	Farrel Bridge Ltd	Methods of and apparatus for treating particulate material with a gas

1975
- 1975-05-23 FR FR7516119A patent/FR2311764A1/en active Granted
1976
- 1976-05-20 TR TR19196A patent/TR19196A/en unknown
- 1976-05-20 ZA ZA763014A patent/ZA763014B/en unknown
- 1976-05-20 GR GR50769A patent/GR58250B/en unknown
- 1976-05-20 JP JP51058459A patent/JPS52795A/en active Granted
- 1976-05-21 GB GB39419/77A patent/GB1549030A/en not_active Expired
- 1976-05-21 DE DE2622994A patent/DE2622994B2/en active Granted
- 1976-05-21 GB GB21196/76A patent/GB1549029A/en not_active Expired
- 1976-05-21 IT IT49595/76A patent/IT1061560B/en active
- 1976-05-21 BR BR3245/76A patent/BR7603245A/en unknown
- 1976-05-31 MX MX100390U patent/MX3470E/en unknown
1979
- 1979-04-16 US US06/030,514 patent/US4247518A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
US4247518A (en)	1981-01-27
JPS5413437B2 (en)	1979-05-30
GR58250B (en)	1977-08-31
ZA763014B (en)	1977-04-27
DE2622994C3 (en)	1979-01-18
TR19196A (en)	1978-06-01
MX3470E (en)	1980-12-09
GB1549030A (en)	1979-08-01
FR2311764A1 (en)	1976-12-17
IT1061560B (en)	1983-04-30
JPS52795A (en)	1977-01-06
FR2311764B1 (en)	1980-07-11
BR7603245A (en)	1977-01-25
DE2622994B2 (en)	1978-05-24
DE2622994A1 (en)	1976-12-09

Publication	Publication Date	Title
GB1549029A (en)	1979-08-01	Process for the conversion of gypsum into calcium sulphate hemihydrate
GB1538102A (en)	1979-01-10	Calcium sulphate hemihydrate plaster
JPS53115693A (en)	1978-10-09	Method of making calcined gypsum
ZA764875B (en)	1977-07-27	Process for the manufacture of highly concentrated phosphoric acid containing calcium sulfate hemihydrate having good filterability
GB1547422A (en)	1979-06-20	Manufacture of gypsum
GB1538103A (en)	1979-01-10	Set-promoting composition for calcium sulphate hemihydrate plaster
GB2053874B (en)	1982-07-28	Production of calcium sulphate
GB2076791B (en)	1983-03-09	Alpha calcium sulfate hemihydrate production
ZA761041B (en)	1977-09-28	Manufacture of portland cement
IL35950A0 (en)	1971-03-24	Process for the manufacture of anhydrous calcium sulphate ii from synthetic gypsum,a plaster or a cement containing the same
GR63625B (en)	1979-11-27	Process for water-profing of gypsum works
ZA742881B (en)	1975-05-28	Process for the production of calcium fluoride from fluosilicates and byproduct gypsum
IL50380A0 (en)	1976-10-31	Setting retarders for technical gypsum plasters
JPS5632325A (en)	1981-04-01	Manufacture of calcium sulfate hemihydrate
ZA772739B (en)	1978-03-29	Process for the manufacture of shaped products from calcium sulphate dihydrate
JPS544897A (en)	1979-01-13	Hydration of hemihydrate gypsum
JPS5210898A (en)	1977-01-27	Method of calcining basic ferricc sulfate
YU114377A (en)	1982-06-30	Process for producing cement clinker
JPS51135927A (en)	1976-11-25	Gypsum cement composition
JPS548625A (en)	1979-01-23	Production of reinforced gypsum
IL46920A (en)	1978-06-15	Production of plasters from phosphogypsum
JPS5439434A (en)	1979-03-26	Method of making high gypsum type special cement
ZA814775B (en)	1983-08-31	Production of gypsum hemihydrate
AU491623B2 (en)	1976-11-04	Manufacture of calcium sulphate alpha-hemihydrate
JPS5237927A (en)	1977-03-24	Calcined gypsum portland cement compound

Legal Events

Date	Code	Title	Description
1979-10-10	PS	Patent sealed [section 19, patents act 1949]
1986-02-05	PCNP	Patent ceased through non-payment of renewal fee